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Finding the Fourth Proportional to 576.42, 795.74 and 355.56

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Solution

The fourth proportional to 576.42, 795.74 and 355.56 is: 490.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.42 : 795.74 = 355.56 : x
  2. Step 2: Convert to fraction form
    576.42/795.74 = 355.56/x
  3. Step 3: Cross multiply
    576.42x = 795.74 × 355.56
  4. Step 4: Simplify right side
    576.42x = 282,933.31
  5. Step 5: Solve for x
    x = 282,933.31/576.42
  6. Step 6: Final answer
    x = 490.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.